JP4904856B2 - Heat pump water heater - Google Patents

Description

  The present invention relates to a configuration of a heat pump type hot water heater.

FIG. 6 is a configuration diagram of a conventional heat pump type water heater. Conventionally, as shown in FIG. 6, a heat pump type water heater provided with a refrigeration cycle and a hot water storage tank has water contained in a compressor 102, a hot water storage tank 103, and a foam insulation container 105 on a first base 101 that forms a product bottom. -The refrigerant heat exchanger 106 is disposed, and the circulation pump 104, the blower fan 109, and the evaporator 110 are disposed in the space separated by the second substrate 107 and the sound insulating plate 108 at the upper part thereof. (For example, refer to Patent Document 1).

Further, FIG. 7 is a side view of a conventional heat pump type water heater. In FIG. 7, the first substrate 101 and the second substrate 107 are configured to communicate with each other through a cylindrical pipe 111, and condensed water and defrost water generated from the evaporator 110 flow down to the second substrate 107. The condensed water and defrost water that have flowed down are connected to the cylindrical pipe 111, penetrate the first substrate 101, and are discharged to the outside of the product as drain water.
JP 2005-172384 A

  However, in the conventional configuration, when the outside air temperature becomes below the freezing point in winter or the like, and the heat pump type hot water heater is operated under the outside air temperature, the condensed water and defrost water generated from the evaporator are second substrate. Then, the inside of the cylindrical pipe connected to the second substrate is connected, but the cylindrical pipe is cooled to the same outdoor outdoor temperature by the outside air, and the condensed water remaining in the cylindrical pipe remains. Or, the defrost water freezes and grows into ice, and the drainage treatment is repeated, so that the ice grows further, the inside of the cylindrical pipe is eventually blocked with ice, and finally the ice that has overflowed to the second substrate has grown. The evaporator was closed and the heating performance was lowered.

  This invention solves the said conventional subject, and it aims at providing the heat pump type water heater excellent in drainage which can drain reliably, without condensate water and defrost water freezing. To do.

In order to solve the above-mentioned conventional problems, the heat pump type water heater of the present invention is a refrigerant in which a refrigerant is circulated by sequentially connecting a water-refrigerant heat exchanger, a decompression means, and an evaporator housed in a foam insulation container. A circulation circuit; a first substrate on which the water-refrigerant heat exchanger is disposed; and a second substrate on which the evaporator is disposed. The second substrate is disposed above the first substrate. A drain outlet is provided on the second substrate at a position facing the water-refrigerant heat exchanger , and a groove through which water drained from the drain outlet flows is provided at the top and side of the foam insulation container . It is characterized by this.

  It is possible to provide a heat pump type hot water heater that is capable of reliably draining condensed water and defrosted water without freezing and having excellent drainage.

According to a first aspect of the present invention, a compressor, a water-refrigerant heat exchanger housed in a foam insulation container , a decompression means and an evaporator are sequentially connected to circulate the refrigerant, and the water-refrigerant heat exchanger is arranged. A first substrate to be disposed; and a second substrate on which the evaporator is disposed. The second substrate is disposed above the first substrate, and the water-refrigerant heat exchange is performed on the second substrate. Water-refrigerant heat that is constantly at a high temperature during operation by providing a drain outlet at a position opposite to the container and providing a groove through which water drained from the drain outlet flows in the upper and side portions of the foam insulation container. The surface of the exchanger is always kept at a temperature higher than the outside air temperature due to its heat conduction, and the condensed air and defrost water are frozen inside the product by the airflow having a temperature higher than the outside temperature staying near the drain. Due to the growth of ice inside the product. It is possible to prevent a deterioration of thermal performance.

In addition, heat loss from the water-refrigerant heat exchanger can be reduced, and even when housed in a foam insulation container, an air flow having a temperature higher than the outside air temperature stays near the drain outlet during normal operation. While reducing heat dissipation loss and improving efficiency, it also has high drainage.

In addition, it is configured to receive the condensed water and defrost water flowing down from the drain outlet in the groove, the condensed water and defrost water falling in the groove along the groove provided on the top and side of the foam insulation container It flows down and can be reliably discharged outside.

  According to a second invention, in particular, in the first invention, a hot water storage tank, a circulation pump, and a water-refrigerant heat exchanger are sequentially connected to circulate water, and the hot water storage circuit and the refrigerant circulation circuit are combined into one Since it is configured so that it is not separated into a heat pump unit and a hot water storage tank unit because it is housed in the housing, there is no water piping connecting the heat pump unit and the hot water storage tank unit, so waterproofness can be ensured and the product has excellent safety It can be. In addition, since the compressor, the water-refrigerant heat exchanger, and the water pump are arranged in the same section between the first substrate and the second substrate, the length of the refrigerant pipe and the hot water supply pipe connecting various devices is shortened. It is possible to improve the hot water supply efficiency by reducing the heat dissipation loss in the piping.

In the third invention, particularly in the first or second invention, the upper part of the foam insulation container is inclined, so that the condensed water and defrost water flowing down to the foam insulation container are smoothly discharged along the inclination. And prevent it from staying on the foam insulation container.

According to a fourth aspect of the invention, in particular, in the first to third aspects of the invention, by providing a flange shape at the drain outlet, the condensed water and defrost water that have flowed down from the evaporator can be reliably discharged to a predetermined position of the foam heat insulating container. can do.

In the fifth invention, in particular, in the fourth invention, by providing a taper in the flange shape, water droplets adhering to the flange shape are prevented, water drainage is improved, and water adhering to the drain outlet is iced. It is possible to prevent the drainage port from being blocked.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a front view of the configuration of the heat pump type water heater in the first embodiment of the present invention. In FIG. 1, a heat pump type hot water heater is provided with a water-refrigerant heat exchanger 6 housed in a compressor 2, a hot water storage tank 3, a circulation pump 4 and a foam insulation container 5 on a first substrate 1, A blower fan 9 and an evaporator 10 are arranged in a space defined by the second substrate 7 and the sound insulating plate 8 in the upper part.

FIG. 2 is a side view of the configuration of the heat pump type water heater in the first embodiment of the present invention. FIG. 3 is a perspective view of a foam insulation container covering the water-refrigerant heat exchanger 6 of the heat pump type hot water heater in the first embodiment of the present invention. In FIG. 2, a drain port 12 for draining condensed water and defrost water generated from the evaporator 10 is provided on the second substrate 7 on which the evaporator 10 is disposed. At this time, the drain port 12 is provided at a position facing the water-refrigerant heat exchanger 6 disposed on the first substrate 1.

Further, in FIG. 3, an inclined portion 14 is provided on the upper surface of the foam heat insulating container 5, and a groove shape is obtained by forming a convex portion 13 by aligning the concave portion 16 of the groove at a position facing the drain port 12. 15 is constituted. In addition, the groove shape 15 may be formed by cutting out the concave portion in the main body of the foam heat insulating container 5 and processing it in addition to the convex portion 13. The inclined portion 14 of the upper surface of the foam insulation container 5, is drained from the drain port 12 the condensed water and defrost water flows down to the upper surface of the foam insulation vessel 5 flows down condensed water and Joshimosui the inclination of the inclined portion 14 Since it flows down along the direction, it does not accumulate on the upper surface of the foam insulation container 5. Moreover, since the recessed part 16 of the groove shape 15 is provided in the position facing the drain port 12, the condensed water and the defrost water surely flow out to the outside along the recessed part of the groove shape 15. Therefore, the condensed water and defrost water dripped from the drain port 12 in the direction of the arrow in FIG. 2, and the outside along the groove shape 15 formed on the upper surface and the side surface of the foam heat insulating container 5 covering the water-refrigerant heat exchanger 6. It becomes the composition which flows out to.

FIG. 4 is a perspective view of the second substrate of the heat pump type water heater in the first embodiment of the present invention, and FIG. 5 is the second substrate of the heat pump type water heater in the first embodiment of the present invention. It is AA sectional drawing. In FIG. 4, the drain port 12 is provided on the second substrate 7. In the present embodiment, only one drain outlet 12 is provided, but a plurality of drain outlets 12 may be provided as long as the position faces the foam heat insulating container 5. In addition, when providing two or more, it is desirable to provide the groove shape provided in the foam heat insulation container 5 according to the number of drains, and in that case, a groove-shaped recessed part is provided in the position facing each drainage port.

  In FIG. 5, the outlet configuration of the drain port 12 is configured by a flange shape 17, and a tapered portion 18 is provided at the end of the flange shape 17.

  The operation and action of the heat pump type water heater configured as described above will be described below.

First, when condensed water and defrost water are generated from the evaporator 10, the water flows down from the evaporator 10, and the condensed water and defrost water are collected at the drain port 12 provided on the second substrate 7. Dripping. At that time, since the flange shape 17 is provided in the drain port 12, since condensed water and defrost water are dripped along the flange shape, the condensed water and defrost water are surely inserted into the recess 16 of the groove shape 15. Dripping. Moreover, since the taper part 18 is provided in the edge part of the flange shape 17, since it becomes the structure which water is collected and dripped along the taper direction of the taper part 18, the retention of the water droplet in the flange shape 17 is prevented, Since the retained water does not grow into ice and block the drain port 12, the processability of water droplets is improved. Moreover, since condensed water and defrost water are reliably dripped at the recessed part 16, it does not scatter other than the drainage path inside a product. Since this drain outlet 12 is provided in the upper part of the foam insulation container 5 which accommodated the water-refrigerant heat exchanger 6, it is nearer to the drain outlet 12 than the outside air temperature by the heat released from the foam insulation container 5. Since high-temperature air stays, the growth of ice at the drain port 12 is prevented, and the product does not freeze inside, so that the heating performance can be prevented from deteriorating due to the growth of ice.

Next, since the drain port 12 and the recessed portion 16 are in a position facing each other, the condensed water and the defrosted water are dripped into the recessed portion 16 and directly to the outside along the groove shape limitedly formed by the protruding portion 13. Flows out. At this time, the upper surface 14 of the foam heat insulating container 5 because of the inclined direction flowing condensed water and defrost water along the groove shape 15 has a structure easily flow out water along the groove shape 15, foam In addition to preventing the ice from growing without staying in the heat insulating container 5, it is possible to shorten the time for water to flow to the outside.

As described above, in the present embodiment, the condensed water and the defrosted water generated from the evaporator 10 are provided on the second substrate 7 and on the top of the foam insulation container 5 by providing the drainage port 12. Groove shape provided in the foam insulation container 5 is prevented by the heat released from the outer wall of the foam insulation container 5 heated by the heat of the water-refrigerant heat exchanger, preventing ice growth at the drain port 12. Condensed water and defrosted water are collected in 15 and the upper surface of the foam heat insulating container 5 has an inclined portion in the direction in which the condensed water flows out, so that the treatment time of the condensed water can be shortened and the foam heat insulating container 5 Condensate does not stay on the top surface of the product, so it can be treated smoothly outside the product without freezing inside the product due to the influence of low outside air temperature below the freezing point. Prevents growth and heatability at low temperatures It can be stably ensured.

  As described above, the configuration of the heat pump type hot water heater according to the present invention includes an integrated heat pump type hot water heater in which a heat pump cycle and a hot water supply cycle are integrated, a separate type heat pump type hot water heater configured separately, and for hot water supply. It can be applied to water-refrigerant heat exchangers of various heat pump water heaters such as direct hot water heat pump water heaters that can heat hot water heated by a heat exchanger as it is. It is applicable also to the heat pump apparatus which has.

Configuration front view of a heat pump type water heater in the first embodiment of the present invention Side view of the configuration of the heat pump type water heater in the same embodiment The perspective view of the foam insulation container which comprises the heat pump type hot-water supply machine in the embodiment The perspective view of the 2nd board | substrate which comprises the heat pump type water heater in the same embodiment AA cross section Configuration front view of conventional heat pump water heater Configuration side view of conventional heat pump water heater

DESCRIPTION OF SYMBOLS 1 1st board | substrate 2 Compressor 3 Hot water storage tank 4 Circulation pump 5 Foam heat insulation container 6 Water-refrigerant heat exchanger 7 2nd board | substrate 8 Sound insulation board 9 Blower fan 10 Evaporator 12 Drain outlet 13 Convex part 14 Inclination part 15 Groove shape 16 Concave part 17 Flange shape 18 Taper part

Claims (5)

A compressor, a water-refrigerant heat exchanger housed in a foam insulation container , a decompression means, and a refrigerant circulation circuit for circulating the refrigerant by sequentially connecting the evaporator, and a first substrate on which the water-refrigerant heat exchanger is disposed; A second substrate on which the evaporator is disposed, the second substrate being disposed above the first substrate, and at a position facing the water-refrigerant heat exchanger on the second substrate. A heat pump type hot water heater provided with a drain port and provided with a groove through which water drained from the drain port flows in an upper portion and a side portion of the foam heat insulating container . The hot water storage tank, the circulation pump, and the water-refrigerant heat exchanger are sequentially connected to provide a hot water storage circuit for circulating water, and the hot water storage circuit and the refrigerant circulation circuit are housed in one housing. The heat pump type water heater described in 1. The heat pump type hot water heater according to claim 1 or 2 , wherein an upper portion of the foam insulation container is inclined. The heat pump type hot water heater according to any one of claims 1 to 3 , wherein a flange shape is provided at the drain port. The heat pump type water heater according to claim 4 , wherein a taper is provided in the flange shape.

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